Electric accumulator.



nu. 7|2,3|6. Y l Patented oct. 28,1902. F. LoPP, H. P. Monm, G. .1.' A. Gamm & D. P. MARTIN. ELECTRIC ACGUMULATOR.

(Application led Oct. l26, 1899.) (No Model.) 3 Sheeis--Sheet l.

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ELECTRIC Acc'uMuLATo.

(Application filed Oct. 26, 1899.)

(No Model.)

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ELECTRIC ACGUMULATUB.

(Applm'ntion led Oct. 26, 1899.'

(N0 Model.) 3. Sheets-.Sheet 3.

000000000000` 000000000000 000000000000 v000000000000 -000000000000 0000'00-0f000-00k 000000000000 000000000000 0000000000000 '0 0'f00-0000000f0 "0000.00000000 000000000000 (Mfr/fram NITED STATES EEICE.

FRANCOIS LOPP, HENRY PAUL MORIN, GEORGES JEAN ADOLPI'IE GRINER,

AND DENIS PHILIPPE MARTIN, OF PARIS, FRANCE.

ELECTRIC ACCUIVIULATOR.

er'ECIEIGA'IION forming part of Letters :Patent No. 712,316, dated october 2s, 1902. I Application filed October 26, 1899. Serial No. 734,875. (No model.)

To a/ZZ whom it may concern:

Be it known that we, FRANoIs LOPPE, HENRY PAUL MORIN, GEORGES JEAN ADOLPIIE GRINER, and DENIS PHILIPPE MARTIN, engineers, citizens ofthe Republic of France, residingin Paris, France, have invented certain new andl useful Improvements in Electric Accumulators, of which the following is a specification.

1o Our invention. relates to certain improvements in and connected with electricaccul mulators, and the following is the description and method of constructing the same.

The annexed drawings show the Various I5 parts of an accumulator constructed in accordance with our invention.

Figure l represents a front elevation of an electrode. Fig. 2is a vertical section through the line 2 2 of Fig. l. Fig. 3 is a horizontal 2o section on line 3 3 of Fig. l. Fig. 4 is a portion of a vertical section,drawn to an enlarged scale, on line 4 4 of Fig. l. Fig. 5 is a portion of a Vertical section, also on an enlarged scale,

on line 5 5 of Fig. l. Fig. 6 is a portion of a vertical section similar to Fig. 5, but on a larger scale, and in this case its plate is fixed on the Plante system. Fig. 7 shows'an ele- Vation of an insulating perforated plate or separator. Fig. 8 is a horizontal section through the same. Fig. 9 is a vertical sectional elevation of a mounted accumulator.

This improved accumulator or storage battery is formed of a number of plates of lead or lead alloy, the positive and negative elec- 3 5 trodes being similarly constituted Whether anode or cathode. Each plate or electrode is essentially formed of several sheets placed close together and united. These sheets may be formed of a single plate folded into und u- 4o lations or of several separate and distinct Y plates. To construct the electrode in the former case, we take a thin lead plate of suitable shape, preferably rectangular, and this plate is undulated and perforated with a large number of small holes, usually and preferably formed in sucha manner that the metal around these holes is repousse in the form of the lower frustum of a cone and jutting out in similar manner. The undulations or corrugations should be numerous and close together. The holes are so formed that the v conic projections are distributed over both faces of the plate. We cannot better compare the appearance of each surface than to that of a nutmeg-grater. The sheet so undulated and perforated is folded a certain n u mber of times, so that thefolds divide it into equal divisions, and the different sections so formed are folded so as tolie closely together. Extensions are provided forthe purpose of tak- 6o ing off the discharges of current, which when placed together unite to form one single lug or projection. The parallel sheets so arranged can thus have within opposite faces and at their ends a coating of some active materialsuch as oXid of lead, lead salts, pulverulent lead, &c. This coating can be effected by placing or pasting the active material on the sheets at the time that folds are made therein or by electrolytically depositing the spongy 7o lead thereon, these substances at the time of .the phenomena termed formation being changed into spongy lead and peroxid of lead.

VThe active material may also be provided` alone by the'metal of the plate in case the ao- 75 cumulator is formed according to the Plante system.

To construct the electrode according to the second method, We take several thin Sheets of lead of the same size and undulated and 8o perforated, as before, and place them together before applying to their faces layers of the active material selected, either by coating or by electrolytic deposit, or according to Plants method. We wish to remark, however, that in any case We reserve the right to `use sheets of woven lead Wire or lattice-work in lieu of the perforated lead plates. The lead plates are then secured together by suitable solder on one or more of their edges or by 9o rivets running through them at suitable points of the surface or otherwise suitably connected together. In these plates so formed, either of a folded single sheet or of ,sheets joined together by soldering or riveting, holes or apertures of suitable shape are provided. These holes, which run through them from side to side perpendicularly or obliquely, or both, are for the purpose of allowing vfree circulation of the liquid and also of increasxoo ing the surface of the active material.

Figs. l, 2, 3, 4, uand 5 of the annexed drawings represent an electrode so formed. The small openings, made so that the metal edges are raised, are shown at a a. a. The rivets are designated l) b b and the holes for the circulation of the liquid c c c. The rivets may themselves be tubular, as shown on the drawings. The different layers forming a plate may be in their upper parts fixed at convenient distances apart by means of distance-pieces of lead d. The active material is shown at e. The electrodes so formed are arranged parallel to one another in a cell, and between them may be placed plates f, of insulating substance, Figs. 7 and S, perforated with holes which coincide with those in the electrodes. These plates are arranged to .prevent all contact of adjacent electrodes with each other and to allow by means of insulating connections g the Whole to be held together in one piece or block, Fig. 9. These connections should preferably be formed of india-rubber rings, so that the set of electrodes and of insulating-plates will have a certain degree of elasticity, thus permitting the active material to increase in volume, while preventing warping or movement of the plates immersed in the liquid. These insulating connections may be of strips perforated with holes and furnished with ribs or slots. They may also be replaced by combs, clips, or riders slipped or clamped over the plates.

Fig. 6 represents, in the case of an accumulator arranged on the Plante system, the method of joining the sheets forming the electrodes by means of rivets. The separation of these sheets is obtained by means of distancepieces or packing h, surrounding the rivet.

Our accumulator gives rapid charges and discharges,because the active material is compressed between the sheets forming each electrode and because the active material is in very thin layers. Thus the greatest distance between one point of the active material and the lead sheet is reduced to a minimum. The apparatus also possesses very slight resistance. On the other hand, the circulation of the electrolyte is perfect on account of the holes in the plates and the insulators interposed between the latter. This circulation insures the homogeneity of the electrolytic liquid and its thorough use.

On account of the short distance of any point of the active material or mass from the electrolyte this active mass always works under the most favorable conditions.

What we claim as our invention, and desire to secure by Letters Patent, is

An electric accumulator comprising a plurality of perforated plates, the walls of the perforations having conical projections, an active mass arranged between the plates, metal distance-pieces arranged between the plates at one end, and perforated rivets connecting the several plates.

In testimony whereof we have signed our names to this specification in the presence of two subscribing Witnesses.

ERAN-cols LoPPE.

HENEE PAUL MORIN.

GEORGES JEAN ADoEPIIE GEINEE. DENIS PHILIPPE MARTIN.

Witnesses:

1. ALLIsoN BOWEN, GEORGE E. LIGHT. 

